Migration Wizard: Unable to Open Directory Object

Hi, I would like to migrate my Exchange 5.5 accounts to Zimbra. I'm trying to use the ZCS Migration Wizard for Exchange, but after I select my NT4 domain account from the Object Picker and return to the Migration Wizard, I get error "Unable to Open Directory Object". Here are the my conditions:

Zimbra 3.1.1 is up and running under Fedora Core 4. I've been able to send and receive test emails using the admin account. I upgraded my client to Windows XP with Service Pack 2, and upgraded to Microsoft Outlook 2003 as required by the Migration Wizard.

I created a new Mail Profile called "Zimbra Migration" and added my email account with a Server Type of Microsoft Exchange Server. I told the Migration Wizard to use this Profile.

If this has to do with my network still being on a Windows NT 4 domain, then I'm in a Catch-22 because in the past, I was unable to install Exchange 5.5 on an Active Directory server.

we haven't tested mixed mode environments at all; when I get back in the office (monday) I'll check what attributes the wizard looks for to determine user accounts are valid.

when the wizard logs on to exchange, it determines the version. if the version is 5.5, it shouldn't allow you to use the object picker; it should only give you access to build an LDAP query. Did you try using the LDAP query builder?